中国电力 ›› 2014, Vol. 47 ›› Issue (12): 7-12.DOI: 10.11930/j.issn.1004-9649.2014.12.7.5

• 发电 • 上一篇    下一篇

燃用神华煤2 028 t/h亚临界锅炉超低NOx 燃烧优化试验研究

黄军   

  1. 神华国华(北京)电力研究院有限公司,北京 100025
  • 收稿日期:2014-10-20 出版日期:2014-12-18 发布日期:2015-12-08
  • 作者简介:黄军(1982—),男,四川绵阳人,博士,工程师,从事锅炉清洁燃烧技术研究。E-mail: huangjun0522@126.com
  • 基金资助:
    神华国华电力科技资助项目(空气分级燃烧多目标参数耦合优化研究); This work is supported by the sci; & tech; research project of Shenhua Guohua Power: study on coupling of multi-objective optimization of staged air combustion

Experimental Study on Combustion Optimization for Ultra Low NOx Emissions in 2 028 t/h Sub-Critical Boilers Firing Shenhua-Coal

HUANG Jun   

  1. ShenhuaGuohua (Beijing) Electric Power Research Institute Co., Ltd., Beijing 100025, China
  • Received:2014-10-20 Online:2014-12-18 Published:2015-12-08

摘要: 为摸清燃用神华煤锅炉深度空气分级超低NOx燃烧规律,实现防结渣、高效燃烧和超低NOx排放一体化目标,以多目标综合优化技术为基础进行定向调整试验。主要是通过制粉系统和辅助风系统配风方式优化后,机组热效率由94.00%提升至94.14%,SCR入口处NOx排放由129.0 mg/m3降为108.3 mg/m3;空气预热器入口处CO体积分数由338×10-6降为50×10-6,同时飞灰可燃物质量分数和大渣可燃物质量分数均有大幅降低。完整吹灰次数也由每班1次减少为每天1次,炉内清洁程度明显加强。

关键词: 锅炉, 空气分级, 超低NOx, 燃烧

Abstract: In order to figure out the mechanism of ultra-low NOx combustion in deep staged air in the boilers firing Shenhua coal and achieve the integrative goals of anti slagging, high efficiency combustion and ultra-low NOx emission, the directional adjustment test based on the multi-objective optimization technique is conducted. Through the optimization on the air distribution of the coal pulverizing system and auxiliary air system, the thermal efficiency is improved from 94% to 94.14%, the NOx emissions at the entrance of SCR is reduced from 129 to 108.3 mg/m3, and the CO concentration of air pre-heater inlet also drops from 338 to 50 ppm with the unburned carbon contents both in fly ash and slag significantly decreased. The soot-blowing also is reduced from 3 times to 1 time one day, and the furnace cleanliness is enhanced significantly.

Key words: boiler, deep air staged combustion, ultra-low NOx emission, pulverized coal fineness

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